rats: rats: Glycogen Content in Three Sections of Rat Livers
In thoree/stat340: Data and functions for BIAS at NMBU

rats	R Documentation

rats: Glycogen Content in Three Sections of Rat Livers

Description

Three experimental treatments were administered to rats, and the glycogen content of different sections of the rats’ livers was analysed as the response variable.

Usage

rats

Format

A tibble with 36 observations (rows) and 4 variables (columns).

	Column name	Data type	Description	Values
`[,1]`	`Glycogen`	numeric	Glycogen content in the liver section	(125 - 162)
`[,2]`	`Treatment`	numeric	3 different treatments	(1, 2, 3)
`[,3]`	`Rat`	numeric	The rat within each treatment	(1, 2)
`[,4]`	`Liver`	numeric	The section of the liver	(1, 2, 3)

Details

The experiment was performed as follows:

There were two rats per treatment. The total number of rats was n = 3 × 2 = 6.
After each rat was killed, its liver was cut up into three pieces: a left-hand bit, a central bit, and a right-hand bit. Because each of the six rats produced three bits of liver; the number of samples becomes 6 × 3 = 18.
In addition, two separate preparations were made from each macerated bit of liver to assess the measurement error associated with the analytical machinery. There are 2 × 18 = 36 numbers in the table.

Source

⁠The R book⁠, M.J. Crawley, Wiley, 2007 (Chapter 19).

Examples


# Boxplot of the glycogen content in the central bit of the liver
central_bit <- rats[which(rats$Liver == 2),]
boxplot(Glycogen~Treatment, data = central_bit,
        main = "Glycogen content in the central bit of the liver",
        ylab = "Glycogen content")

thoree/stat340 documentation built on June 30, 2024, 4:04 p.m.